SPECIATION Modes of
... Species concepts • Isolating mechanisms • Speciation modes and tempo • Hybrids A. formosus ...
... Species concepts • Isolating mechanisms • Speciation modes and tempo • Hybrids A. formosus ...
Supplementary Data - Word file
... order and orientation and cluster them. The orientation of each cluster is either "+" or "-" (defined as expected from the given coordinate system). Create a list, L, of these seed clusters. Step2: Initialize the Cluster Distance Matrix. Define the bounds of a cluster as its endpoints on each axis o ...
... order and orientation and cluster them. The orientation of each cluster is either "+" or "-" (defined as expected from the given coordinate system). Create a list, L, of these seed clusters. Step2: Initialize the Cluster Distance Matrix. Define the bounds of a cluster as its endpoints on each axis o ...
Estimating the Rate of Adaptive Molecular Evolution When the
... substitutions. Note that the problem is reduced, but not eliminated by using all available alleles, rather than randomly choosing one allele, because there is a lesser chance that a polymorphism will appear to be fixed in a sample of sequences than appearing in a single sequence. However, polymorphi ...
... substitutions. Note that the problem is reduced, but not eliminated by using all available alleles, rather than randomly choosing one allele, because there is a lesser chance that a polymorphism will appear to be fixed in a sample of sequences than appearing in a single sequence. However, polymorphi ...
Punctuated Equilibria: The Tempo and Mode of Evolution
... allopatric speciation). (Our model of punctuated equilibria works equally well for sympatric speciation when two conditions are met [see Bush et al, in press, for their defense]: daughter species must arise from a small subgroup of the parental population, and they must do so in no more time than it ...
... allopatric speciation). (Our model of punctuated equilibria works equally well for sympatric speciation when two conditions are met [see Bush et al, in press, for their defense]: daughter species must arise from a small subgroup of the parental population, and they must do so in no more time than it ...
24 - Lab Times
... abundant, competing most fiercely with each other. Thus, individuals who focus on less lucrative, but also less overcrowded, resources can have an advantage. However, in contrast to the gold-rush situation, such resource changes do not happen within the lifetime of an individual; they can only come ...
... abundant, competing most fiercely with each other. Thus, individuals who focus on less lucrative, but also less overcrowded, resources can have an advantage. However, in contrast to the gold-rush situation, such resource changes do not happen within the lifetime of an individual; they can only come ...
Phylogenetic history underlies elevational biodiversity patterns in
... regions may have high species richness because their topographic heterogeneity (or other factors) drives high rates of speciation relative to rates of extinction (speciespump model; Moritz et al. 2000; Rahbek & Graves 2001). Such elevational differences in diversification rate (Zspeciation rateKexti ...
... regions may have high species richness because their topographic heterogeneity (or other factors) drives high rates of speciation relative to rates of extinction (speciespump model; Moritz et al. 2000; Rahbek & Graves 2001). Such elevational differences in diversification rate (Zspeciation rateKexti ...
Chapter 24 ppt
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
Chapter 24
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
Chapter 24
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
Landscape structure and genetic architecture jointly impact
... new environmental conditions (Malcom 2011). In order to better understand the factors that drive the distribution and dynamics of species ranges, it is thus crucial to explore these interactive effects and their impact on the species’ rates of adaptation to novel conditions. Here, we investigate the ...
... new environmental conditions (Malcom 2011). In order to better understand the factors that drive the distribution and dynamics of species ranges, it is thus crucial to explore these interactive effects and their impact on the species’ rates of adaptation to novel conditions. Here, we investigate the ...
species
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
... • Sympatric speciation can also result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more recently introduced apple trees ...
Species distribution
Species distribution is the manner in which a biological taxon is spatially arranged. Species distribution is not to be confused with dispersal, which is the movement of individuals away from their area of origin or from centers of high population density. A similar concept is the species range. A species range is often represented with a species range map. Biogeographers try to understand the factors determining a species' distribution. The pattern of distribution is not permanent for each species. Distribution patterns can change seasonally, in response to the availability of resources, and also depending on the scale at which they are viewed. Dispersion usually takes place at the time of reproduction. Populations within a species are translocated through many methods, including dispersal by people, wind, water and animals. Humans are one of the largest distributors due to the current trends in globalization and the expanse of the transportation industry. For example, large tankers often fill their ballasts with water at one port and empty them in another, causing a wider distribution of aquatic species.Biogeography is the study of the distribution of biodiversity over space and time. It is very useful in understanding species distribution through factors such as speciation, extinction, continental drift, glaciation, variation of sea levels, river capture and available resources. This branch of study not only gives a description of the species distribution, but also a geographical explanation for the distribution of particular species. The traditional biogeographic regions were first modeled by Alfred Wallace in The Geographical Distribution of Animals (1876). These were based on the work of Sclater's terrestrial biogeographic regions. Wallace's system was based on both birds and vertebrates, including non-flying mammals, which better reflect the natural divisions of the Earth due to their limited dispersal abilities.